For now I use synching to sync my devices ( 2 PC and my GOS phone).

If my house burn or my 3 PC and phone are stolen, I'm in trouble... FOr now, I don't backup onto some SSD drive that I " could " store offSite and update it a few times / year.

I was curious, what OpenSource solutions are some of you using ?

NextCloud ? Something better ?

Syncthing is cool but it's not exactly the same as all Cloud solution we can access with any devices .

    Someone just suggested me seafile on the Telegram channel. Other options ?

    yoda68 Be careful if you start going down that rabbit hole. You might not see the light of the sun again ...
    I use Immich, Radicale, Matrix/Synapse/SchildiChat, Vaultwarden, SearXNG, Hauk, Mailserver/Roundcube, ...

      yoda68 Be aware of the security considerations of opening your own cloud.

        Eirikr70 I will may be stick to Syncthing between my devices(including my GOS phone) .... Tks for the warning

        I use primarily syncthing and nextcloud. Been extremely happy. But like @Eirikr70 said, it's a rabbit hole... Enough that it caused me to completely change career fields... Lol